ssl_client2, ssl_server2: code optimization + guards adaptation

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/programs/ssl/ssl_test_lib.h b/programs/ssl/ssl_test_lib.h
index c2afc96..eb29dc7 100644
--- a/programs/ssl/ssl_test_lib.h
+++ b/programs/ssl/ssl_test_lib.h
@@ -314,6 +314,11 @@
 /* Helper functions for FFDH groups. */
 uint16_t mbedtls_ssl_ffdh_group_from_name(const char *name);
 const uint16_t *mbedtls_ssl_ffdh_supported_groups(void);
+#if defined(MBEDTLS_ECP_LIGHT) || \
+    (defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_SOME_EPHEMERAL_ENABLED) && \
+    defined(PSA_WANT_ALG_FFDH))
+int parse_curves(const char *curves, uint16_t *group_list, size_t group_list_len);
+#endif
 
 #endif /* MBEDTLS_SSL_TEST_IMPOSSIBLE conditions: else */
 #endif /* MBEDTLS_PROGRAMS_SSL_SSL_TEST_LIB_H */